Sewing machine



2 Sheets-Sheet 2 INVENTOR GeolyeM-'me BY akin/aim J.' @75E-#55 ATTORNEY lSEWING MACHINE Filed Nov. l0, 1921 G. M. EAMES ET AL Dec. 16, 1924.

wlTN ESS ES I da-ww?,

Dec. t6, 1924.

GEORGE M. EAMES AND VJOHN S. FINCH, 0F BRIDGEPOBT, CONNECTICUT, .ASSJIG'N'OBS 'IO THE SINGER MANUFACTURING COMPANY,

PORATION 0F NEW JERSEY.

0F ELIZABETH, NEW JERSEY, A. GOR- SEWING MACHINE.

Application ined nqvembr io, 1921. serial no. 514,181.

following is a specification, reterpnce being had therein to the accompanying drawings.

This invention relates to improvementsin sewing machines and particularlyfto that class of sewing machines commonly designated hemst-itching-machine.

The primary object of thisinvention is to' increase to a substantial degree the capabilf" .ity of high speed of operation of machines of this character and reduce to a substantial degree the vibrations particularly incident in sewing machines employing a laterally vibrating needle.

Other and more specific objects of theinvention will bey apparent from the following description and claims. l

In its preferred embodiment, the present .invention comprises a sewing machine having the usual cloth-plate andoverhanging f tubular bracket-arm 1n which latter is journaled the main-actuating shaft of the machine or imparting vertical reciprocatoryv This main-shaft. connections with a loop-. taker actuating shaft and a feed-shaft jourf.

movements to the needle. has belt-driving 'aa-led beneath the cloth-plate substantially parallel with and in the vertical plane vlcontaining the axis of rotation of the mainszliaft. The feed-shaft is journaled in suitable bearings provided in the machine-frame nd` carries actuating cams for imparting rising and falling as well as forward'and backward Jfeed-movements to the feed-dog. This feed-shaft also carries an actuating cani beneath the cloth-plate which has operative connections with the needle-vibrating rod `tor laterally 'vibrating the needle. reason of the fact that this feed-shaft'carries the several cams Inentioned beneath the cloth-plate, vibration of the overhanging arm oiE the machine is considerably lessened over machines in which the feed-actuating cams and the needle-vibrating cams are carried by the overhanging arm.

The feed-shaft is tubular and disposed within is the loop-taker actuatinto a block 24 affording ing shaft rotating in the same direction as the feed-shaft. shaft is journaledat one end within the rotating feed-shaft which journaling by reason of the shafts rotating in the same direc- .t-ion at diilerent speeds considerably lessens The loop-taker actuating 55,

the friction and distributes the wearing aca tion of the loop-taker shaft throughout the journaling provided by the feed-shaft. rThe forward end of the loop-taker actuating shaft is connected by twoeto-one gearing with .a loop-taker rotatable upon disposed axis in the usual manner.

1n the accompanying drawings, Fig. 1 is a front side sectional elevation of a machine embodying the present improvements. Fig.

a vertically e5 2 is a bottomA plan view of the same. Eig.' 70

3 is a front end elevation ofthe machlne/ lwith theace-plates removed. Fig. 4 is a y sectional view substantially on the line wof Fig. 2.

Referring machine comprises a' cloth-plate 1 from which rises a hollow standard 2 of a tubu- 'lar overhanging bracket-arm 3 terminating in a head 4. Suitably journaled in the over-Y hanging armkis a carrying at one end a belt-pulley 6 and provided at its opposite end with the usual.

crank connected b v means oa link 7 with abar 8 journaled for vertical, reciprocatory movements in the head 4.

Secured by means of a screw 9 to the lower end ot the bar 8 is a supporting bracket 10, carrying an angled piercer-holder 11 in which'are secured, by means of set-screws, 12, the 14. Fulcrumed upon the bracket 10 by means of a pivot-screw 15 is an oscillatory auxiliary bracket 16 upon which is adjustably secured, by means of a screw 17, the

main and auxiliary piercers 13 and to the drawings, the present main actuating shaft 5 30 shank of a socketed needle-clamp 18 suitably 95 carrying a needle 19. Suitably secured to the auxiliary bracket 16 and projecting upwardly ltherefrom is a needle-vibrating rod 20 of which the upper end is slidingly mounted in a. swivel joint 21 carried by a 100 )vibrating guide-bar 22. The guide-bar 22 is supported at its upper end for swinging movements upon a pivot-screw 23 threaded Y an upper bearing for the bar 8.v ,To steady .the swinging more ments et the guide-bar 09 the lower end and,

. carries shaft 5, the two shafts rotating *in the same" y Slidinglyfitted within a which latter 1s I screw 45 upon lshaft, but spaced therefrom 42, the parts being thereof is provided with a tering a notch in a block 26 er bearing for the bar 8. j

A needle-thread take-up 27 is fulcrulned upon the machine frame and is actuated from a slide-block 28 in the usual manner, While a presser-bar 29 is suitably journaled for endwise movements in the head 4 and yielding presser-feet, as 30. Intermediate its ends, the guide-bar 22 has a ball-socket connection with one end of a pitman 31 of which the opposite end passes through an elongated slot 32 formed in a transverse boss 33 on the end of an arm 34. vertical aperture provided in the boss 33 is a swivel-pin 35 having an aperture, alined with the slot 32 and enteredby the 'end of the pitman 31 secured therein by means of a set-screw 36. It will be understood that endwise movement ofthe swivel-pin 35 is prevented by the-engagement of the parallel walls of the guide-tin 25 enaft'ording a lowslot 32 with the pitman 31, but that the pin is capable of a rocking movement limited by the length of the slot 32. The arm 34 is adjustably secured by means of a screw 37 within aradial guideway 38 provided'in a head 39 suitably secured ,upon the upper end of a rock-shaft 40 journaledy in vertically alined bearings provided in the ma-l j chine frame.

The main actuating shaft- 5 carries peripherally groove belt-pulleys41 and 42. Pulley 41 is connected by means of a clip-belt 43 with a like grooved pulley 44, the hub of secured as by means of a seta tubular, feed-actuating shaft 46. 'Ille pulleys 41 and 44 are so proportoned that the feed-shaft 46 completes one revolution in three revolutions of the maindirection. .Adjacent one end thereof, the

feed-shaft 46 is ljournaled in a bushing 4T secured by a set-screw 48 in a bearing lug 49 provided on the machine frame, while at Hr a bushing 50. The bushing 50 -is secured by a set-screw 51 in a gear-housing 52 attached to the machine frame by screwsas 53.

Journaled at one end in the bushing 50 and adjacent its opposite end in an enlarged portion of tlre feed-shaft 46 is a loop-taker actuating shaft 54, concentric with said feedexcepting at the rearward end of the latter. This spacing provides a minimum of wearing surface and affords `a lubricant receptacle between the two shafts. The actuating shaft 54 projects beyond the rearward end of the .feed-shaft 46 and upon this projection is secured h3 set-screws as 55 the hub of a peripherally grooved pulley 56 which embraces the hub of the pulley 44. The pulley 56 is connected by means of ya clip-belt 57 with the pulley so proportioned that the .upper end the shaft 60 carries a rotanv its opposite end this feed-shaft is journaled.

shaft 5 tionally I hub of the pulle \7 56 abuts against the end of the actuating shaft 46. thereby preventing endwise movement of the' shaft- 54 in one direction while endwise movement in the opposite direction prevented by the hub of a bevel-gear 58 suitably secured upon the end of the shaft 54 'within the housing 52. It will be" observed that a slight clearance is provided between the end` face of the feedshaft 46 andthe bushing 50 to permit of' movement 'of this bushing as may be necessary to properly adjust the bevel-gear 58.

The bevel-gear 58 meshes with a similar gear 59 secured upon a loop-taker carrying shaft 60 journaled in vertically alined bearings provided in the housing 52. At its loopand theshaft 54 rotate uni-directaker 61. the beak 62 of which rotates substantially horizontal plane and in the formation of lock-stitches coacts in the usual manner with the needle 19 to cast loops of the needle-thread around a mass of under thread within the path of travel of the beak 62. The loop-taker 61 is rotated twice for each rotation of the actuating shaft 54 and therefore of the main-shaft 5. At its lower end there is secured upon the shaft 60 a collar 63 having an eccentric portion 64 embraced by the strap of a pitman 65 for actuating a needle-guard 66. As this needleguard forms the subject of a separate patent of John C. Ringe, No. 1.484.191. dated February-19, 192 struction and operation are fully set forth. it is not deemed necessary to herein make further reference thereto.

`Secured upon the actuating shaft 46 by means of a set-screw 67 is a needle-vibrating peripheral cam-groove69 cam 68 having a entered by a roller 70 carriedby Van arm 71 projecting laterally7 from the rock-'shaft -needle 19'common to hemstitching machines.

but b v reason of the present location of this cam the vibrations of the overhanging arm are reduced to a minimum at high speed operation.

The actuating shaft 46 also carries feedactuating cams 72 and 73. each suitably secured upon said shaft. The feed-cam T2 is provided on one face thereof with a camgroove 74 entered by aA cam-roller 75 carried by a vibratory arm 7 6. The vihratory arm 76 projects laterally from aA fulcrum-shaft 77 journaled in a suitable bearing provided in a bracket 78 attached by screws. as 79. to the machine frame underneath the clthplate. Preferably formed integral with the vibratory arm 76 is'a .segmental guideway 80 in which is adjustably secured by means of a .screw-bolt. 81 a slide-block 82 connected and in the ratio of one to one. The

in a

4 wherein the details of' its con-l enter the vinterior thereof and be conducted Lamas@ with one end of a pitman 83 of which the other end is pivotally secured to a. rock-arm 84 clamped to a feed-rocker shaft 85 journaled in suitable bearings provided on the machine `frame. carries spaced arms pivotally supported of a feed-bar 88 carrying 86 between which is the transverse boss 87 the usual feed- Jdog 89 The .feed-bar 88 is provided with a slideway 9() entered by a slide-block 91` carried by a rock-armk 92 clamped to one end of a feed-lift rock-shaft 93 suitably iournaled beneath the ploth-plate 1. The rock-shaft 93 at its other end has a vibratory arm 9-1 carrying a cam-roller 95 entering a camgroove 96 provided in one face of the cam 73. The cam-grooves 74 and 96 are so formed as to respectively impart to .the feed-dog feed and feed-lift movements in relatively timed relation as to effect two forward `and one backward feeding movement of the fabric .for each hemstitch figure, i` e., during `three successive work-penetrating movements of the needle 19. Asvthe-relatcd movements of the needle and the f feed-dog To effect a hemstitch figure arewell known in the art, it is not fv deemed necessary to herein repeat a description thereof.

Means is provided Afor conducting lubricant to the shafts 46 and 54ev An inclined duct 97 provided in the standard 2 communicates with an enlarged opening 98 inr the cloth-plate and in which opening is inserted some absorbent material. The lug 49 is providedwith a duct 99 leading from the opening 98 to an aperture 100 in the bushing 47 to lubricate the feed-shaft beari ing in the bushing. The bushing-aperture 100 communicates with-an aperture 101 provided in the feed-shaft 46, whereby during revolutions of the shaft 46 lubricant may through a slot 102 to lubricate the loopershaft bearing in the feed-shaft. i

` The described construction and' arrange has provided a` ment of the several parts hemstitching machine capable of a very substantial increase in speed of operation with less vibration and wear of the parts thany Y was incident in machines of prior construc- 555 invention,

tion and at the same time has produced a comparatively (uiet rpnning machine.

Having thus set forth the nature of the what we claim herein is- 1. In a sewing machine, the combination with a cloth-plate, a vertically reciprocating and laterally vibrating needle, means for imparting the 'vertical reciprocating move' ments to themeedle, a rotary thread-mass rycarrying' loop-taker complemental to said needle-infthe formation of lock-stitches. and a feed-dog, of a plurality of actuating shafts journaled coaxially beneath said cloth-plate, and means for imparting the latervlly vi- The feed-rocker shaft 85,'

' carrying loop-taker vneath said cloth-plate,

plate substantially taining the axis of said rotary shaft, belt brating movements to said` needle, the rotary movements to the loop-taker and the feeding movements to the feed-dog from said actuating shafts.- Y

2. In a sewing machine, with a cloth-plate, a vertically reciprocating and laterally vibrating needle, meansffor imparting the vertically reciprocating movements to the needle, a rotary thread-mass carrying loop-taker complementa] to said needle in the formation of lock-stitches, and a feed-dog, of a plurality of actuating shafts journaled oaxially beneath said. cloth-plate, means for actuating said loop-taker from 'one of said shafts, and means for imparting the laterally vibrating movements to the needle and feeding movementsto said 'feeddog` from the other 'of said shafts.

3. lna sewing machine, the combination with a cloth-plate, an overhanging arm, a rotary shaft journaled in said overhanging arm, a needle, operative connections between said shaft and, said needle for endwise reciprocating the latter, a rotary thread-mass needle Ain a feed-dog,

rotary shaft journaled in said overhangmg arm, a needle, operative connections between said shaft and said needle for endwise re'- ciprocating the latter.. a loop-taker complemental to thel needle in th formation of stitches, and a feed-dog. of a plurality of actuating shafts substantially parallel to said rotary shaft iournaled beneath said clothin the vertical plane condriving connections independent of each other between the rotary shaft and said actuating shafts fer rotating the latter, and means for actuating the loop-taker and the feed-dog from said actuating shafts.

5. In a sewing machine` the combination with a cloth-plate, an overhanging` arfn. a rotary shaft journaled in said overhanging arm. a needle` operative connections between said shaft and said: needle for endwise re ciprocating the latter, and a feed-dog, of a 'feed-dog actuating shaft journaled beneath said cloth-plate substantially in the vertical plane containing the axis of rotation of said rotary-shaft. driving connections `between said shafts including proportionate pulleys carried'by said shafts and-.a pulley-connecting, belt whereby the feed-actuating shaft rotates at one third the speed of rotationnof said, rotary shaft, `and operative connections the combination complemental to the y sald main shaft and the needle between the feed-dog actuating shaft and the feed-dog for imparting to the latter fabric feeding movements.

6. In a sewing machine, in' combina-tion, a cloth-plate, a rotary main shaft, an endwise reciprocating and laterally vibrating needle; operative lconnections intermediate for endwise reciprocating the latter, a feed-dog, a feedl workeengaging and Work-advancing movements 'to the feed-dog from said feed-dog dog actuating shaft journaled cloth-plate, means for rotating said feeddog actuating shaft from the main-shaft.; operative connections for imparting both` actuating shaft, and operative connections between the feed-do, actuating shaft and said needle for laterally vibrating the latter.

With a cloth-plate, aneedle,

beneath the- 7. In a sewing machine,I the combination GEORGE M. EAMES. JOHN s; Einen. Y

means for-end- 2.,

disposed l 'f means for f 25 feed andfeed-lift movements to 30 

